2022
DOI: 10.1038/s41467-022-28364-y
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General heterostructure strategy of photothermal materials for scalable solar-heating hydrogen production without the consumption of artificial energy

Abstract: Solar-heating catalysis has the potential to realize zero artificial energy consumption, which is restricted by the low ambient solar heating temperatures of photothermal materials. Here, we propose the concept of using heterostructures of black photothermal materials (such as Bi2Te3) and infrared insulating materials (Cu) to elevate solar heating temperatures. Consequently, the heterostructure of Bi2Te3 and Cu (Bi2Te3/Cu) increases the 1 sun-heating temperature of Bi2Te3 from 93 °C to 317 °C by achieving the … Show more

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Cited by 89 publications
(40 citation statements)
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“…For example, notwithstanding CuO nanoflakes reaching a prominent solar absorptance (97.5%), the temperature difference between heat and cold sides is only 5.3 °C . As a comparison, the Bi 2 Te 3 /Cu-based SSA (α = 89%; ε = 5%) could boost the surface temperature from 93 to 317 °C under the same solar radiation flux in vacuum . This highlights the advantage of the SSA in advancing STEG performance.…”
Section: Introductionmentioning
confidence: 92%
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“…For example, notwithstanding CuO nanoflakes reaching a prominent solar absorptance (97.5%), the temperature difference between heat and cold sides is only 5.3 °C . As a comparison, the Bi 2 Te 3 /Cu-based SSA (α = 89%; ε = 5%) could boost the surface temperature from 93 to 317 °C under the same solar radiation flux in vacuum . This highlights the advantage of the SSA in advancing STEG performance.…”
Section: Introductionmentioning
confidence: 92%
“…Therefore, raising solar-thermal conversion efficiency on the heat side of STEG is an effective method. In this context, a spectrally selective absorber (SSA), which allows for high solar absorptance (α) in the solar spectrum (0.3–2.5 μm), but low thermal emittance (ε) in the infrared region (2.5–20 μm), is an ideal candidate for the increment of heat side temperature. In contrast, nonselective solar absorbers have inferior solar energy harvesting ability because of their significant IR thermal loss . Under identical solar intensities, the SSA will capture a higher balance temperature compared to the nonselective counterpart, making it more suitable for the enhancement of STEG performance .…”
Section: Introductionmentioning
confidence: 99%
“…The BiO x /CeO 2 was loaded into a reported Ti 2 O 3 based photothermal device as shown in Fig. 4a, 13 which used the Ti 2 O 3 layer to fully absorb the solar spectrum and convert it as thermal energy to heat over BiO x /CeO 2 (Fig. S14 and S15 †).…”
Section: Catalysis Science and Technology Papermentioning
confidence: 99%
“…RWGS consumes a large amount of non-renewable energy. 11,12 Photothermal catalysis has the potential to solve the energy bottleneck of RWGS and the heterostructure photothermal catalysis developed by Li et al could achieve 317 °C under 1 sun light illumination (1 kW m −2 of energy density), 13,14 able to drive RWGS under outdoor solar irradiation.…”
Section: Introductionmentioning
confidence: 99%
“…Light-to-heat conversion is a widespread energy conversion process in nature and human developed systems. Photothermal materials, that include carbon-based materials 1,2,41 , nanocrystals [3][4][5][6][7][8] , metal oxides [9][10][11] and organic molecules [12][13][14][15][16][17][18] , are key components to achieve functionality of photothermal therapy [19][20][21]42 , solar-driven water evaporation [22][23][24][25][26] , photothermal catalysis 27,28 , photothermal imaging and sensor [29][30][31] .…”
Section: Introductionmentioning
confidence: 99%